diff -up src/module_list.py.orig src/module_list.py
--- src/module_list.py.orig	2016-08-10 11:12:07.237021979 -0400
+++ src/module_list.py	2016-08-10 11:12:44.420023403 -0400
@@ -89,6 +89,7 @@ except ValueError:
 #########################################################
 
 singular_libs = ['singular', 'flint', 'ntl', 'gmpxx', 'gmp', 'readline', 'm']
+singular_incs = [SAGE_INC + '/singular', SAGE_INC + '/factory']
 
 #########################################################
 ### Givaro flags
@@ -172,16 +173,19 @@ ext_modules = [
     Extension('sage.algebras.letterplace.free_algebra_letterplace',
               sources = ['sage/algebras/letterplace/free_algebra_letterplace.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.algebras.letterplace.free_algebra_element_letterplace',
               sources = ['sage/algebras/letterplace/free_algebra_element_letterplace.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.algebras.letterplace.letterplace_ideal',
               sources = ['sage/algebras/letterplace/letterplace_ideal.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.algebras.quatalg.quaternion_algebra_cython',
@@ -632,7 +636,8 @@ ext_modules = [
                                                         [])),
 
     Extension('sage.libs.lrcalc.lrcalc',
-              sources = ["sage/libs/lrcalc/lrcalc.pyx"]),
+              sources = ["sage/libs/lrcalc/lrcalc.pyx"],
+              include_dirs = [os.path.join(SAGE_INC, 'lrcalc')]),
 
     Extension('sage.libs.pari.closure',
               sources = ["sage/libs/pari/closure.pyx"]),
@@ -665,33 +670,39 @@ ext_modules = [
     Extension('sage.libs.singular.singular',
               sources = ['sage/libs/singular/singular.pyx'],
               libraries = ['givaro'] + singular_libs,
+              include_dirs = singular_incs,
               language="c++",
               extra_compile_args = givaro_extra_compile_args),
 
     Extension('sage.libs.singular.polynomial',
               sources = ['sage/libs/singular/polynomial.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.libs.singular.ring',
               sources = ['sage/libs/singular/ring.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.libs.singular.groebner_strategy',
               sources = ['sage/libs/singular/groebner_strategy.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.libs.singular.function',
               sources = ['sage/libs/singular/function.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++",
               extra_compile_args = givaro_extra_compile_args),
 
     Extension('sage.libs.singular.option',
               sources = ['sage/libs/singular/option.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.libs.symmetrica.symmetrica',
@@ -700,17 +711,21 @@ ext_modules = [
 
     Extension('sage.libs.mpmath.utils',
               sources = ["sage/libs/mpmath/utils.pyx"],
-              libraries = ['mpfr']),
+              libraries = ['mpfr'],
+              include_dirs = [os.path.join(SAGE_INC, "flint")]),
 
     Extension('sage.libs.mpmath.ext_impl',
               sources = ["sage/libs/mpmath/ext_impl.pyx"],
-              libraries = ['mpfr']),
+              libraries = ['mpfr'],
+              include_dirs = [os.path.join(SAGE_INC, "flint")]),
 
     Extension('sage.libs.mpmath.ext_main',
-              sources = ["sage/libs/mpmath/ext_main.pyx"]),
+              sources = ["sage/libs/mpmath/ext_main.pyx"],
+              include_dirs = [os.path.join(SAGE_INC, "flint")]),
 
     Extension('sage.libs.mpmath.ext_libmp',
-              sources = ["sage/libs/mpmath/ext_libmp.pyx"]),
+              sources = ["sage/libs/mpmath/ext_libmp.pyx"],
+              include_dirs = [os.path.join(SAGE_INC, "flint")]),
 
     ###################################
     ##
@@ -718,7 +733,8 @@ ext_modules = [
     ##
     ###################################
 
-    Extension('*', ["sage/libs/arb/*.pyx"]),
+    Extension('*', ["sage/libs/arb/*.pyx"],
+              include_dirs = [SAGE_INC + '/flint', SAGE_INC + '/arb']),
 
     ###################################
     ##
@@ -891,7 +907,7 @@ ext_modules = [
     Extension("sage.matrix.matrix_complex_ball_dense",
               ["sage/matrix/matrix_complex_ball_dense.pyx"],
               libraries=['arb', 'mpfi', 'mpfr'],
-              include_dirs=[SAGE_INC + '/flint'],
+              include_dirs=[SAGE_INC + '/flint', SAGE_INC + '/arb'],
               language = "c++"),
 
     Extension('sage.matrix.matrix_complex_double_dense',
@@ -963,6 +979,7 @@ ext_modules = [
     Extension('sage.matrix.matrix_mpolynomial_dense',
               sources = ['sage/matrix/matrix_mpolynomial_dense.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.matrix.matrix_rational_dense',
@@ -1284,6 +1301,7 @@ ext_modules = [
     Extension("sage.rings.complex_arb",
               ["sage/rings/complex_arb.pyx"],
               libraries=['mpfi', 'mpfr', 'gmp'],
+              include_dirs=[SAGE_INC + '/flint', SAGE_INC + '/arb'],
               language = 'c++'),
 
     Extension('sage.rings.complex_double',
@@ -1356,6 +1374,7 @@ ext_modules = [
     Extension("sage.rings.real_arb",
               ["sage/rings/real_arb.pyx"],
               libraries = ['mpfi', 'mpfr'],
+              include_dirs=[SAGE_INC + '/flint', SAGE_INC + '/arb'],
               language = 'c++'),
 
     Extension('sage.rings.real_lazy',
@@ -1562,17 +1581,20 @@ ext_modules = [
     Extension('sage.rings.polynomial.multi_polynomial_ideal_libsingular',
               sources = ['sage/rings/polynomial/multi_polynomial_ideal_libsingular.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.rings.polynomial.plural',
               sources = ['sage/rings/polynomial/plural.pyx'],
               libraries = ['m', 'readline', 'singular', 'givaro', 'gmpxx', 'gmp'],
+              include_dirs = singular_incs,
               language="c++",
               extra_compile_args = givaro_extra_compile_args),
 
     Extension('sage.rings.polynomial.multi_polynomial_libsingular',
               sources = ['sage/rings/polynomial/multi_polynomial_libsingular.pyx'],
               libraries = singular_libs,
+              include_dirs = singular_incs,
               language="c++"),
 
     Extension('sage.rings.polynomial.multi_polynomial_ring_generic',
diff -up src/setup.py.orig src/setup.py
--- src/setup.py.orig	2016-08-10 11:12:07.241021980 -0400
+++ src/setup.py	2016-08-10 11:12:09.577022069 -0400
@@ -65,6 +65,7 @@ except KeyError:
 
 # search for dependencies and add to gcc -I<path>
 include_dirs = sage_include_directories(use_sources=True)
+include_dirs.extend(['@@CYSIGNALS@@'])
 
 # Manually add -fno-strict-aliasing, which is needed to compile Cython
 # and disappears from the default flags if the user has set CFLAGS.